The Temple of the Inscriptions, Palenque
How do you build a pyramid around a tomb that has to be sealed forever — placing a multi-tonne carved lid inside a vaulted crypt before there is any pyramid to carry it — and then run a stone tube from the coffin to the temple floor above?
begun in the last decade of Pakal's life and completed shortly after 683 CE by his son Kʼinich Kan Bahlam II · Palenque, Chiapas, MexicoAdded August 2026